<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="@/assets/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出登录</el-button>
        </el-header>
        <!-- 主体区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px': '200px'">
                <!-- 折叠按钮 -->
                <el-button type="info" @click="toggleCollapse" :class="isCollapse?'el-icon-s-unfold':'el-icon-s-fold'"></el-button>
                <el-menu  background-color="#333744" text-color="#fff" active-text-color="#409eff" :unique-opened="true" :collapse="isCollapse"  :collapse-transition="false" :router="true" :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单模板 -->
                            <template slot="title">
                                <i :class="iconObj[item.id]"></i>
                                <span>{{item.authName}}</span>
                            </template>
                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/'+ subItem.path" v-for="subItem in item.children" :key="subItem .id" @click="saveNavState('/'+ subItem.path)">
                            <template slot="title">
                                <i class="el-icon-menu"></i>
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- main区域 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>  
</template>

<script>
export default {
    data() {
        return {
            //左侧菜单数据
            menulist:[],
            //字体图标
            iconObj:{
                '125':'el-icon-user-solid',
                '103':'el-icon-s-check',
                '101':'el-icon-s-goods',
                '102':'el-icon-s-claim',
                '145':'el-icon-s-marketing'
            },
            //是否折叠
            isCollapse:false,
            activePath:''  //激活的链接地址
        }
    },
    created(){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        //退出登录
        logout(){
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        //获取左侧菜单数据 请求
        async getMenuList(){
            const{ data:res } = await this.$http.get('menus')
            if(res.meta.status != 200){
                this.$message.error(res.meta.msg)
            }else{
                this.menulist = res.data
            }
            console.log(res)
        },
        //点击按钮 切换菜单的折叠
        toggleCollapse(){
            this.isCollapse = !this.isCollapse
        },
        //保存连接的激活状态 保存sessionStorage
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
        }
    },
}
</script>

<style lang="less" scoped>
    .home-container{
        height: 100%;
    }
    .el-header{
        background-color: #373d41;
        display: flex;
        justify-content: space-between;//左右布局对齐
        padding-left:0;
        align-items: center;//按钮居中
        color:#fff;
        font-size: 20px;
        > div{
            display: flex;
            align-items: center;
            span{
                margin-left: 15px;
            }
        }
    }
    .el-aside{
        background-color: #333744;
        .el-button{
            background-color:#4A5064;
        }
        .el-menu{
            border-right: 0;
        }
    }
    .el-main{
        background-color: #eaedf1;
    }
    .toggle-button{
        
    }
</style>